On the ring of the fairy rings on turfgrasses

Abstract

In my previous papers (1973-1978), it was shown that two types of fairy rings were recognized: the one was Lycoperdon perlatum Pers. which showed green rings on Zoysia spp., and the other was Lepista sordida (Fr.) Singer which showed green and necrotic rings on the Zoysia spp. and the tifgreen. And that the necrotic type of fairy rings on Zoysia mat rella L. was recognized at the golf course. From these necrotic rings, Lepista sordida (Fr.)
Singer is detected at the portion of plant roots area in the soil; and Helminthosporium sp., at the necrotic leaves, stems and roots of the plant. Further experiments and observations were carried out concerning the fairy rings on the trufgrasses. Their results are as follows.
Four types of the fairy ring, caused by the Lycoperdon perlatum Pers. or Lepista sordida (Fr.) Singer on the Zoysia grasses and the bentgrasses, were recognized. The first type is the case of no ring, the second type is the green ring, the third type is the green and necrotic ring, and the forth type is the necrotic ring; and Curvularia sp. was detected at the necrotic leaves and stems of the plant.
These results suggest that the ring of the fairy ring on turfgrasses is not caused directly by the Lycoperdon and Lepista themselves, but caused indirectly by them; namely, these mushrooms present the circumstances to produce the several types of the ring.